IT1262035B - Instrument for the direct measurement of the reverberation time of an environment, and process for applying the said instrument - Google Patents
Instrument for the direct measurement of the reverberation time of an environment, and process for applying the said instrumentInfo
- Publication number
- IT1262035B IT1262035B ITRM930679A ITRM930679A IT1262035B IT 1262035 B IT1262035 B IT 1262035B IT RM930679 A ITRM930679 A IT RM930679A IT RM930679 A ITRM930679 A IT RM930679A IT 1262035 B IT1262035 B IT 1262035B
- Authority
- IT
- Italy
- Prior art keywords
- instrument
- acoustic
- acoustic energy
- direct measurement
- instant
- Prior art date
Links
- 238000000034 method Methods 0.000 title abstract 3
- 238000005259 measurement Methods 0.000 title abstract 2
- 238000012544 monitoring process Methods 0.000 abstract 2
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 238000005070 sampling Methods 0.000 abstract 1
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Measurement Of Unknown Time Intervals (AREA)
Abstract
Instrument and process for the direct measurement of the reverberation time, based on the determination of the acoustic energy density decay time. The said instrument consists essentially of analog-digital converters ADC, banks of digital filters DF, adders SIGMA, etc. To measure the three components of the velocity vector (Fig. 1) it is possible to use, for example, six phase-coupled microphones, each pair being located along one of the three orthogonal directions. The processing time of the six pressure signals obtained from the microphones must be less than the period corresponding to the frequency of sampling the signals acquired in the acoustic range which is to be analysed. By measuring the acoustic energy density instant by instant, it is thus possible to determine its decay time by following the known methods for evaluating the impulse response of the acoustic system. The invention relates to the technical field of acoustics and can be appropriately applied in the field of acoustic monitoring instruments. The invention constitutes an advance, especially in the systems of monitoring the acoustic energy absorption properties of environments. <IMAGE>
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITRM930679A IT1262035B (en) | 1993-10-07 | 1993-10-07 | Instrument for the direct measurement of the reverberation time of an environment, and process for applying the said instrument |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITRM930679A IT1262035B (en) | 1993-10-07 | 1993-10-07 | Instrument for the direct measurement of the reverberation time of an environment, and process for applying the said instrument |
Publications (3)
Publication Number | Publication Date |
---|---|
ITRM930679A0 ITRM930679A0 (en) | 1993-10-08 |
ITRM930679A1 ITRM930679A1 (en) | 1995-04-07 |
IT1262035B true IT1262035B (en) | 1996-06-18 |
Family
ID=11401999
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ITRM930679A IT1262035B (en) | 1993-10-07 | 1993-10-07 | Instrument for the direct measurement of the reverberation time of an environment, and process for applying the said instrument |
Country Status (1)
Country | Link |
---|---|
IT (1) | IT1262035B (en) |
-
1993
- 1993-10-07 IT ITRM930679A patent/IT1262035B/en active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
ITRM930679A0 (en) | 1993-10-08 |
ITRM930679A1 (en) | 1995-04-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Garai | Measurement of the sound-absorption coefficient in situ: the reflection method using periodic pseudo-random sequences of maximum length | |
Pestorius | Propagation of plane acoustic noise of finite amplitude | |
Castagnede et al. | Correlation method for normal mode tracking in anisotropic media using an ultrasonic immersion system | |
Matsuo et al. | Target detectability using coded acoustic signal in indoor environments | |
KR20170124279A (en) | Method and Apparatus for DEMON Processing in order that Removal of External Target Noise When measuring underwater radiated noise | |
Nakayama et al. | Acoustic distance measurement method based on phase interference using the cross-spectral method | |
IT1262035B (en) | Instrument for the direct measurement of the reverberation time of an environment, and process for applying the said instrument | |
Heyser | Instantaneous intensity | |
Hull et al. | An eigenvalue based acoustic impedance measurement technique | |
Papadopoulos et al. | Implementation of an intelligent instrument for passive recognition and two-dimensional location estimation of acoustic targets | |
Sugie et al. | Localizing sound source by incorporating biological auditory mechanism | |
Mathur | A stochastic analysis for cross‐spectral density method of measuring acoustic intensity | |
Burgess | Accurate estimation of amplitude, frequency, and phase of harmonic signal components using an FFT | |
SU945889A1 (en) | Irradiator for correlation acoustic measurements | |
Jiaxiang | A new cross spectral method to locate sound sources | |
Krishnappa | Scattering/diffraction effects of a sound intensity probe incorporating direct particle velocity measurements | |
Nordby et al. | The measurement of sound by the simultaneous use of several time constants | |
Schuck | Investigation into the use of the filtered‐x LMS algorithm for noise reduction in a duct | |
SU708217A1 (en) | Method of evaluating the degree of diffusion of sound field | |
Balant et al. | Use of sound intensity for determination of air‐moving device noise emission | |
Mekarzia et al. | Measurement and Identification of Acoustic Impulse Response | |
Quazi | Nonlinear sonar signal processing | |
Allard et al. | Methods of Measuring the Acoustic Impedance | |
Augutis et al. | Measurement of Quasistationary Random Signal Envelope | |
Paraskevas et al. | Phase spectral processing for improved time-domain soft microphone based noise estimation |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
0001 | Granted | ||
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19971029 |